In 1919 the meteorologist Lewis Fry Richardson wrote two equations for two rival powers. Each arsenal grows in reaction to the other, is dragged back by economic fatigue, and pushed up by a standing grievance. That is the whole model — and it is a real dynamical system.
Whether it settles or explodes turns on one comparison: fatigue vs. reaction (formally, whether a×b beats k×l). Above that knife-edge the two arsenals settle into a balance of power; a hair below it, every buildup answers the last and the race runs away. The stability meter shows exactly where you stand.
Here is the twist that reframes every case study: grievance never touches stability — it only moves where the balance sits. So disarming your weapons to zero, with the grievance still standing, just lets the arsenals climb back to the same point. You can disarm the missiles; you cannot disarm the grudge. Only lowering the grievance moves the equilibrium down.
The simulation stopped unexpectedly — the lesson continues without it. You can move on; nothing you did was wrong.